package thread;

class Counter{
    private int count = 0;
    synchronized public  void add() {  //针对方法进行加锁了
        count++;
    }

    public static void func() {
        synchronized (Counter.class) {  //类对象

        }
    }

    public int get() {
        return count;
    }
}
public class Demo20 {
    public static void main(String[] args) throws InterruptedException {
        Counter counter = new Counter();
        Counter counter1 = new Counter();
        //Object locker = new Object();

        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                //counter.add();
                Counter.func();
            }
        });

        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                Counter.func();
            }
        });

        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println("count=" + counter.get());
    }
}
